Where and how is caffeine exerting its effects

Assignment Help Biology
Reference no: EM136551

Q. You are given the isolated skeletal muscle with its motor neuron intact. This preparation is arranged so that you are able to make electrophysiological measurements from the nerve and the muscle as well as mechanical measurements of muscle contraction. You view that if caffeine is added to the fluid bathing the preparation, the peak tension developed in a muscle twitch produced by stimulating the motor nerve is increased.

i. List all probable points at which caffeine may be exerting its effect.

ii. Caffeine is known to alter the transmembrane movement of calcium. What is (are) the possible site(s) at which caffeine is acting?

iii. High concentrations of caffeine cause an isolated muscle to contract in absence of any activity in the motor nerve. This contraction is not blocked by nicotinic antagonists like curare. Where and how is caffeine exerting its effects?

Reference no: EM136551

Questions Cloud

What limits the size of an animal : A form of vitamin D-resistant rickets, known as hypophosphatemia, is inherited as an x-linked dominant trait. If a male with hypophosphatemia, marries a normal female, which predictions concerning their potential progeny would be true.
This series of reaction is called : If you were asked to create a karyotype from the chromosome spreads you made from HeLa cells in Activity 4.2.1, list materials you would use and explain how you would make the karyotype.
How will the procedure result in purification of tubulin : GTP is again added to the redissolved pellet proteins, and the solution is again warmed for a few minutes. Then centrifugation at similar speed described above is again performed. This process is repeated several times.
How is geological energy different from biological energy : How is geological energy different from biological energy. Charlie has the blood test that shows a normal level of LDLs other than an elevated level of HDLs in his blood. Because his family has a history of cardiovascular disease, he wonders if he mu..
Where and how is caffeine exerting its effects : List all probable points at which caffeine may be exerting its effect. Caffeine is known to alter the transmembrane movement of calcium. What is (are) the possible site(s) at which caffeine is acting.
Healthy individuals of paramecium bursaria : Which of these situations would be most positive to the re-establishment of resident zoochlorellae, assume compatible Chlorella are present in P. bursaria's habitat.
Which leaf-eating insects are consumed by fish : Angel is a biologist studying Lake Ecosystem in which leaf-eating insects are consumed by fish, which are consumed by snakes, which are consumed by hawks. In this case, how would you categorize a fish.
What sorts of plants will you select for crossing : What sorts of plants will you select for crossing. Describe how allergies, common cold or influenza change the structures of the respiratory system and cause decrease in gas exchange.
How do biologists interpret these similarities : Barbara McClintock, famous for discovering that genes might move within genomes, had her meticulous work ignored for nearly 4 decades, but eventually won the Nobel Prize. Why was her work so distrusted.

Reviews

Write a Review

 

Biology Questions & Answers

  Describe what occurs in terms of myocardial oxygen provide

A patient lost a lot of blood during surgery and his blood pressure dropped from 120/80 to 90/50. Describe how the kidneys respond to this change in blood pressure.

  Discuss some of the considerations involved in establishing

Another temperate biome planned for the biome garden is the temperate grassland/desert biome. Your friend is particularly interested in developing temperate grassland. Discuss some of the considerations involved in establishing such grassland under g..

  Protein classification schemes

Protein classification schemes

  Prepare an essay on nosocomial infection

Prepare an essay on nosocomial infection.

  The symptoms of gouty arthritis in susceptible people

What techniques would you utilize to detect this DNA sequence. Mechanical stress or trauma frequently triggers the symptoms of gouty arthritis in susceptible people. In this view elucidate why gouty arthritis affects the great toe more commonly than ..

  Develop symptoms for the duration of the experiments

The results of these experiments point to that plants can be genetically transformed for resistance to virus disease development. What is an expected outcome of a cross between a homozygous recessive woman and a man with hypophosphatemia.

  What will occur to atp synthesis and oxygen consumption

When such a drug is added, what will occur to ATP synthesis and oxygen consumption, if rates of glycolysis and the citric acid cycle stay the similar.

  Which would be most useful for increasing the amount of dna

Barbiturates cause hypoventilation that is the slower-thannormal rate of breathing, since they suppress the respiratory centers in the brain. What happens to the red blood count of a habitual user of barbiturates? Explain in details.

  What is the best description for this genetic situation

How will each of these components be digested? Where within the digestive system will they be digested? Are any accessory organs involved.

  A fabrication company wants to enhance capacity

If there 2000 offspring from this cross, how several of the offspring will you expect to show Ab or aB phenotypes. If the estimated output is 30000 units, which machine must be purchased.

  Assume n-butylmalonate is added to an aerobic

Assume n-butylmalonate is added to an aerobic suspension of kidney cells using glucose exclusively as fuel. Predict, with description, the effect of this inhibitor on.

  A throat culture grew gram-negative diplococci

After contact with a patient's spinal fluid, a lab technician developed fever, nausea, and purple lesions on her neck and extremities. A throat culture grew gram-negative diplococci. What is the genus of bacteria.

Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd